GuardFall tests 11 open-source coding and computer-use agents against shell-command transformations that evade string and regex deny lists, including quote removal, $IFS expansion, command substitution, and encoded payloads. The study finds configuration- and model-dependent failures and shows that local or auto-approve modes can turn untrusted repository content into host command execution; it is vendor-authored research, not an independent benchmark.
GuardFall: a universal shell injection vulnerability in open-source AI agents
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